window.onerror = myOnError;
function myOnError() {
// do nothing
return true;
}

var instwin;

function showinst(whichinst) {
instwin=window.open(whichinst,"Instructions","toolbar=0,width=325,height=375 location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1");
// this focus command creates an error in ie301 for pc test other browsers.
   if (window.focus) {
// If the focus object exists
      instwin.focus();
   }
}

function clearwindow() {
if (instwin!=null) {
   instwin.close();
}
}